package com.fafu.forum.controller;

import com.fafu.forum.common.AppResult;
import com.fafu.forum.common.ResultCode;
import com.fafu.forum.config.AppConfig;
import com.fafu.forum.exception.ApplicationException;
import com.fafu.forum.model.User;
import com.fafu.forum.services.impl.UserServiceImpl;
import com.fafu.forum.utils.MD5Util;
import com.fafu.forum.utils.StringUtil;
import com.fafu.forum.utils.UUIDUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

@Slf4j
// 返回数据的 Controller
@Api(tags = "用户接口")
@RestController
// 路由映射, 一级路径
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserServiceImpl userService;

    /**
     * 注册用户
     * @param username 用户名
     * @param nickname 昵称
     * @param password 密码
     * @param passwordRepeat 确认密码
     * @return
     */
    @ApiOperation("用户注册")
    @PostMapping("/register")
    public AppResult register (@ApiParam("用户名") @RequestParam("username") @NonNull String username,
                               @ApiParam("昵称") @RequestParam("nickname") @NonNull String nickname,
                               @ApiParam("密码") @RequestParam("password") @NonNull String password,
                               @ApiParam("确认密码") @RequestParam("passwordRepeat") @NonNull String passwordRepeat) {
        // 校验密码两次是否相同
        if (!password.equals(passwordRepeat)) {
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_SAME);
        }
        // 准备数据
        User user = new User();
        user.setUsername(username);
        user.setNickname(nickname);
        // 处理密码
        String salt = UUIDUtil.UUID_32();
        String encryptPassword = MD5Util.md5Salt(password, salt);
        user.setPassword(encryptPassword);
        user.setSalt(salt);
        // 调用 service 层
        userService.createNormalUser(user);
        return AppResult.success();
    }

    /**
     * 用户登录
     * @param username 用户名
     * @param password 密码
     */

    @ApiOperation("用户登录")
    @PostMapping("/login")
    public AppResult login(HttpServletRequest request,
                           @ApiParam("用户名") @RequestParam("username") @NonNull String username,
                           @ApiParam("密码") @RequestParam("password") @NonNull String password) {
        // 1. 调用 Service 中的登陆方法, 返回 User 对象
        User user = userService.login(username, password);
        if (user == null) {
            // 打印日志
            log.warn(ResultCode.FAILED_LOGIN.toString());
            // 返回结果
            return AppResult.failed(ResultCode.FAILED_LOGIN);
        }
        // 2. 如果登录成功把 User 对象设置到 Session 的作用域中
        HttpSession session = request.getSession(true);
        session.setAttribute(AppConfig.USER_SESSION,user);
        // 3. 返回结果
        return AppResult.success();
    }



    @ApiOperation("获取用户信息")
    @GetMapping("/info")
    public AppResult<User> getUserInfo(HttpServletRequest request,
                           @ApiParam("用户Id") @RequestParam(value = "id", required = false) Long id){
        // 定义返回的 user 对象
        User user = null;
        if (id == null) {
            // 1. 如果 id 为空, 从 session 中获取用户信息
            HttpSession session = request.getSession(false);
            // 获取用户信息
            user = (User) session.getAttribute(AppConfig.USER_SESSION);
        } else {
            // 1. 如果 id 不为空, 从 id 查询用户信息
            user = userService.selectById(id);
        }
        // 判断是否为空
        if (user == null) {
            return AppResult.failed(ResultCode.FAILED_USER_NOT_EXISTS);
        }

        return AppResult.success(user);
    }

    @ApiOperation("退出登录")
    @GetMapping("/logout")
    public AppResult logout (HttpServletRequest request) {
        // 获取 session 对象
        HttpSession session = request.getSession(false);
        // 判断 session 是否有效
        if (session != null) {
            // 打印日志
            log.info("退出成功");
            // 表示用户在登陆状态下直接销毁 session
            session.invalidate();
        }

        return AppResult.success("退出成功");
    }


    @ApiOperation("修改个人信息")
    @PostMapping("/modifyInfo")
    public AppResult modifyInfo (HttpServletRequest request,
                                 @ApiParam("用户名") @RequestParam(value = "username", required = false) String username,
                                 @ApiParam("昵称") @RequestParam(value = "nickname",required = false) String nickname,
                                 @ApiParam("性别") @RequestParam(value = "gender",required = false) Byte gender,
                                 @ApiParam("邮箱") @RequestParam(value = "email",required = false) String email,
                                 @ApiParam("电话号") @RequestParam(value = "phoneNum",required = false) String phoneNum,
                                 @ApiParam("个人简介") @RequestParam(value = "remark",required = false) String remark) {
        // 1. 接收参数
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);
        // 非空校验
        if (StringUtil.isEmpty(username) && StringUtil.isEmpty(nickname)
                && StringUtil.isEmpty(email) && StringUtil.isEmpty(phoneNum)
                && StringUtil.isEmpty(remark) && gender == null) {
            // 返回错误信息
            return AppResult.failed("请输入要修改的内容");
        }
         User updateUser = new User();
        updateUser.setId(user.getId()); // 用户Id
        updateUser.setUsername(username); // 用户名
        updateUser.setNickname(nickname); // 昵称
        updateUser.setGender(gender); // 性别
        updateUser.setEmail(email); // 邮箱
        updateUser.setPhoneNum(phoneNum); // 电话
        updateUser.setRemark(remark); // 个人简介

        // 调用 service 层
        userService.modifyInfo(updateUser);
        // 查询最新的用户信息
        user = userService.selectById(user.getId());
        // 把新信息设置到 session 中去
        session.setAttribute(AppConfig.USER_SESSION,user);
        // 返回结果
        return AppResult.success();
    }


    @ApiOperation("修改密码")
    @PostMapping("/modifyPwd")
    public AppResult modifyPassword (HttpServletRequest request,
                                     @ApiParam("原密码") @RequestParam("oldPassword") @NonNull String oldPassword,
                                     @ApiParam("新密码") @RequestParam("newPassword") @NonNull String newPassword,
                                     @ApiParam("确认密码") @RequestParam("passwordRepeat") @NonNull String passwordRepeat) {
        // 1. 检验新密码和确认密码是否相同
        if (!newPassword.equals(passwordRepeat)) {
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_SAME);
        }
        // 2. 获取当前登录的用户信息
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);
        // 3. 调用 service 层
        userService.modifyPassword(user.getId(),newPassword,oldPassword);
        // 4. 返回结果
        if (session != null) {
            session.invalidate();
        }
        // 5. 返回结果
        return AppResult.success();
    }


}
